Jotham potter



(No Model.)

G. R. LEAN.

ELECTRIC ARC LAMP.

Patented Feb. 15,1898.

UNITED STATES PATENT OFFICE.

GEORGE R. LEAN, OF CLEVELAND, OHIO; JOTHAM POTTER, ADMINISTRATOR OF SAIDLEAN, DECEASED, ASSIGNOR TO THE JANDUS ELECTRIC COM- PANY, OF SAMEPLACE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 598,943, dated February15, 1898. Applicationfiled February 20, 1897. Serial No. 624,331. (Nomodel.)

To all whom it may concern:

Be it known that I, GEORGE R. LEAN, a resident of Cleveland, in thecounty of Cuyahoga and State of Ohio, have invented certain new anduseful Improvements in Electric-Arc Lamps; andI do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to an improvement in electric-arc lamps of theinclosed arc type and in which both carbons are adapted to be fed so asto produce what is known in the art as a focusing-lamp, the inventionrelating more particularly to the construction of the arc-inclosingglobe and the manner of supporting the same.

The object of my invention is to so construct and arrange the globe forinclosing the arc of a focusing electric-arc lamp that the respectivecarbons can be readily fed freely and snugly through both ends of saidglobe without the necessity for covers.

A further object is to so construct the inner globe of an arc-inclosedelectric-arc lamp that the carbons can be fed snugly through both endsthereof and to so mount the globe that its movement will be permitted inall direc- 0 tions, whereby to compensate for any irregularities of thecarbons.

WVith these objects in view the invention consists in an arc-inclosingglobe for an electrio-arc lamp having openings in both ends,

3 5 both openings being of such size as to permit the free feed but snugfit of both carbons of the lamp.

My invention further consists in the combination, in an electric-arclamp, of an arc-inclosing globe having openings in both ends for thefeed of the carbons, the wall of each opening being adapted to snuglyhug the carbon passing through it, and means for supporting said globein such manner as to permit the globe to have sufficient play tocompensate for irregularities of the carbons.

My invention further consists in certain novel features of constructionand combinations and arrangements of parts, as hereinafter set forth,and pointed out in the claims.

In the accompanying drawings, Figure 1 is aview of an arc-inclosedfocusing electric-arc lamp having myimprovements applied thereto. Fig.2is an enlarged detail sectional view.

' A represents a focusing electric-arc lamp constructed with a largeouter globe B and a small inner or arc-inclosing globe C. The inner orarc-inclosing globe C is preferably made spherical in form and isprovided in its upper and lower ends with holes a 6, respec- 6o tively,for the passage of the respective carbons c d of the lamp, through whichholes the carbons pass freely but sufficiently snug to prevent theadmission of any appreciable amount of air into the globe. The globe Ois provided at its ends contiguous with the open ings a o with shortnecks or enlargements c f, which enter, respectively, holes or open ingsg h in arms 2' projecting from the framework D of the lamp. The weightof the globe is sustained by the lower arm j, while the arm 2' assistsin sustaining the globe in its upright position. The openings 9 h of thearms 2' j are made somewhat larger than the necks or enlargements e f,so that the globe can have sufficient spherical movement to compensatefor any irregularities there might be in the carbons passing through theopenings in the respective ends of the globe.

My improvements are simple in construction, permit the use of anarc-inclosing globe in a focusing-lamp, and are effectual in allrespects in the performance of their functions.

Slight changes might be made in the details of construction of myinvention without departing from the spirit thereof or limiting itsscope, and hence I do not wish to limit myself to the precise detailsherein set forth.

Having fully described my invention, what I claim as new, and desire tosecure by Letters 0 Patent, is

1. In an electric-arc lamp, the combination with the upper and lowercarbons and regulating mechanism for feeding both carbonssimultaneously, of an arc-inclosing globe constructed with contractedopenings at its opposite ends, said openings being of such size as willcause the carbons to snugly fit within the walls of each opening andmeans for supporting the globe which will permit its oppo- I00electric-arc lamp, of arms projecting therefrom having openings and aglobe for inclosin g the arc,supported by said arms and having portionsentering said openings and adapted to have play therein, substantiallyas set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

GEORGE R. LEAN.

WVitnesses:

J. M. SEE, D. W. ROCKWELL.

